Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Operating Loss Carryforwards [Line Items]      
Other comprehensive income (loss), tax $ 2,740,000,000 $ (1,342,000,000) $ 2,933,000,000
Tax effect on common stock and additional paid in capital from employee stock purchase plan activity (128,000,000) (277,000,000) 19,000,000
Unrecognized tax benefits that would impact effective rate 2,500,000,000 3,100,000,000 3,300,000,000
Unrecognized tax benefits is reasonable possible, amount of unrecorded benefit 2,100,000,000    
Penalties and interest expense 127,000,000 99,000,000 (168,000,000)
Penalties and interest accured 888,000,000 775,000,000  
Undistributed earnings of foreign subsidiaries 17,000,000,000    
Deferred tax liabilities, undistributed foreign earnings $ 4,300,000,000    
Minimum [Member]
     
Operating Loss Carryforwards [Line Items]      
Number of jurisdictions for filing income tax returns 100